Lubrication of molds



s. A. BISEY LUBRIQATION 0F HOLDS F11 a o t 4 1922 Feb. 21, 1928.

, Patented Feb. 21, 1928.

I tion by which the UNITED STATES 1,660,112 PATENT OFFICE.

LUBRICATION 0F HOLDS.

' Application Thepresent invention relates particularly to molds of the character covered in my copending application, wherein continuous leads and rules are cast by forcing the molten metal into a mold chamber of the desired shape and continuously withdrawing the product as fast as the metal congeals.

In order that the operation be continuous and uninterrupted it is necessary that the metal in its molten and congealing conditions shall pass into and through the mold chamber Without adhering or clinging to the walls of such chamber.

One of the main purposes of this invention isto overcome this tendency of the metal to adhere to the mold walls and to insure the free passage of the finished product.

One of the novel features of the invenforegoing and other objects are attained is the introduction of a lubricating agent into the stream of molten metal on its way to the mold chamber so that at the time the metal enters the mold the lubricant will have dispersed sufficiently to form a filmsurrounding' and in effect coating the body of metal.

Other novel'features of the invention will appearas the specification proceeds.

- applied thereto.

The accompanying drawing one simple form of the invention, it being understood that the structure may be modified without departure from the true spirit and scope of-the invention, hereinafter defined and claimed. 1

Figure 1 is a broken part sectional plan arts of the melting 0t and view showing with the mold lu ricator the mold cham r Figure 2 is a cross sectional view as taken on substantially the plane of line 2-2 of Figure 1.

In the illustration the melting pot is indicated at 5, equipped with suitable pumping mechanism 6 for supplying the molten metal in a substantially continuous stream through the threat 7 to the mold chamber 8.

The mold chamber may as by means of a water jacket so as to cause the metal to congeal therein and as the metal congeals and assumes the shape of a final roduct, Such as a lead or rule which is creed or withdrawn by means of cooperating endless drawing chains.

Oil or other suitable lubricating agent is introduced into the stream of molten metal,

illustrates but.

, solidified states to pass on freel and insures a be suitably cooled,-

from the chamber asfiled October 4, 1922. Serial No. 592,210.

in the present disclosure by means of an injector in the nature of a nozzle 10 supplied with lubricant through a suitable connection 11 and having its orifice controlled by a needle valve 12. In the construction illustrated the throat or passage has an angular bend therein and the injector is introduced at the corner of this bend so that the lubricant enters the stream of metal substantially at the center thereof and while flowing in the same direct-ion. Furthermore, by making the nozzle with somewhat abrupt corners, as shown, there is a tendency for the onfiowing metal to produce a slight valve, which tends to facilitate the flow of lubricant.

The lubricant may be supplied under pressure, as by means of a small rotary pump'13, but the onfiowing injector effect, tending to carry off with it the lubricant released at the tip of the nozzle. To prevent any opposite effect, that is, of the metal Working back into the nozzle, the needle valve may be set to reduce the orifice to a point where it will pass the lubricant butwill not pass the molten metal.

As the stream of metal flows on to the mold chamber, the lubricant, being lighter,' disperses and seeks the outer surface of the stream, forming in effect an envelope contactin the mold walls and enabling the metal in itsfluid, semi-fluid, solidifying and without clinging or freezing to the mol walls.

The lubricant introduced in this waythus speeds up the operation, protects the mold clean cut, sharpl defined final product,- free of burrs or ot'er imperfections.

While the invention is particularly adaptable to the continuous casting machine of my invention; it will be clear from the foregoin that the invention is applicable to infrom the melting pot vacuum about the end of the needle I stream of metal has an' termlttent and other forms of casting machines.

What I claimis:

1. The combination with a mold for continuous casting, including a mold chamber with means for supplyin a continuous flow of material thereto an for continuously withdrawing the solidified product therefrom, of means for continuously introduc ing a lubricant into the body of the material flowing to the mold chamber.

2. The combination with a forpror ducing castingsof indefinite length, including a mold chamber withv a supply passage leading thereto, of anozzle introduced into and terminating within said supply passage so as to be surrounded by the ing material and means for injecting a con- 'trollable supply of lubricant through said nozzle. I

'3. In apparatus of the character disclosed, a melting pot, a casting. chamber open for the exit of the product shaped therein, a supply passage extending from the melting pot to the casting chamber and a lubricant supplying nozzle entered in and disposed Within said passage.

4. The structure -of claim 3 in which the passage has an angular turn therein and in which the nozzle is introduced at such turn.

5. In apparatus of the character disclosed, a melting pot, a casting chamber connected therewith and a lubricant'supplying nozzle entered into the body of molten metal sup: plied to thecasting chamber and havingan orifice discharging in the direction of flow of the molten metal.

6. In apparatus of the character disclosed, a melting pot, a casting.v chamber open for the discharge of the product shaped therein, a supply passage extending from the melting pot to the casting chamber, means for forcing the molten metal through said 'passage under pressure, a lubricant supplying nozzle having an orificev at the end of the same discharging into said passage and means for accurately regulating'said nozzle orifice to a size large enou h to pass lubricant to the molten metal but too small to permit flow of molten metal into the nozzle.

7. In ap aratus of the character disclosed, a mold. an means for supplying a flow 'of material thereto, a-lubricant supplying nozzle positioned in the flow of material to .inject lubricant into the center of the stream of such material and means for controlling said nozzle to admit lubricant to the material and to exclude material from the nozzle.

8. The herein disclosed process of lubricating molds which includes injecting a lubricat'i'ng medium into the stream ofmaterial flowing to the mold chamber through an orifice and adjusting said orifice to pass the lubricant but exclude the material.

9. The herein disclosed casting process which includes continuously forcing a supply of fluid material to amold chamber, continuousl withdrawing the product from the mold vcli amber as it takes form therein and injecting a lubricating medium into the body of the material supplied to the mold chamber.

10. The combination with a mold chamber open at one end for the exit of the castings produced therein, of an injector for introducing oil under pressure centrally into the opposite end of said mold chamber.

In witness whereof, I have hereunto set my handthis 20th day of July, 1922.

' SUNKER ABA-J1 BISEY. 

